diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 9ed5dfa..6735000 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -1231,10 +1231,11 @@
 int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want );
 
 int mbedtls_ssl_write_handshake_msg_ext( mbedtls_ssl_context *ssl,
-                                         int update_checksum );
+                                         int update_checksum,
+                                         uint8_t force_flush );
 static inline int mbedtls_ssl_write_handshake_msg( mbedtls_ssl_context *ssl )
 {
-    return( mbedtls_ssl_write_handshake_msg_ext( ssl, 1 /* update checksum */ ) );
+    return( mbedtls_ssl_write_handshake_msg_ext( ssl, 1 /* update checksum */, 1 /* force flush */ ) );
 }
 
 int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl, uint8_t force_flush );